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#if !macintosh
#include <sys/types.h>
#else
#include <SizeTDef.h>
#endif
#include <regex.h>
#include <mlvalues.h>
#include <alloc.h>
#include <fail.h>
#include <memory.h>
struct regexp_struct {
final_fun finalization;
struct re_pattern_buffer re;
};
typedef struct regexp_struct * regexp;
static void free_regexp(expr)
regexp expr;
{
regfree(&(expr->re));
}
static regexp alloc_regexp()
{
value res = /* Finalized values must be alloc'd in the major heap */
alloc_shr(sizeof(struct regexp_struct) / sizeof(value), Final_tag);
Final_fun(res) = (final_fun) free_regexp;
return (regexp) res;
}
#define RE_SYNTAX RE_SYNTAX_EMACS
static char * case_fold_table = NULL;
value str_compile_regexp(src, fold) /* ML */
value src, fold;
{
regexp expr;
char * msg;
Push_roots(root, 1);
root[0] = src;
expr = alloc_regexp();
src = root[0];
Pop_roots();
re_syntax_options = RE_SYNTAX;
if (Bool_val(fold) && case_fold_table == NULL) {
int i;
case_fold_table = stat_alloc(256);
for (i = 0; i <= 255; i++) case_fold_table[i] = i;
for (i = 'A'; i <= 'Z'; i++) case_fold_table[i] = i + 32;
for (i = 192; i <= 214; i++) case_fold_table[i] = i + 32;
for (i = 216; i <= 222; i++) case_fold_table[i] = i + 32;
}
expr->re.translate = Bool_val(fold) ? case_fold_table : NULL;
expr->re.fastmap = stat_alloc(256);
expr->re.buffer = NULL;
expr->re.allocated = 0;
msg = (char *) re_compile_pattern(String_val(src), string_length(src),
&(expr->re));
if (msg != NULL) failwith(msg);
re_compile_fastmap(&(expr->re));
expr->re.regs_allocated = REGS_FIXED;
return (value) expr;
}
static regoff_t start_regs[10], end_regs[10];
static struct re_registers match_regs = { 10, start_regs, end_regs };
value str_string_match(expr, text, pos) /* ML */
regexp expr;
value text, pos;
{
switch (re_match(&(expr->re), String_val(text), string_length(text),
Int_val(pos), &match_regs)) {
case -2:
invalid_argument("Str.string_match");
case -1:
return Val_false;
default:
return Val_true;
}
}
value str_search_forward(expr, text, pos) /* ML */
regexp expr;
value text, pos;
{
int len = string_length(text);
int start = Int_val(pos);
int res = re_search(&(expr->re), String_val(text), len, start, len-start,
&match_regs);
switch(res) {
case -2:
invalid_argument("Str.search_forward");
case -1:
raise_not_found();
default:
return Val_int(res);
}
}
value str_search_backward(expr, text, pos) /* ML */
regexp expr;
value text, pos;
{
int len = string_length(text);
int start = Int_val(pos);
int res = re_search(&(expr->re), String_val(text), len, start, -start-1,
&match_regs);
switch(res) {
case -2:
invalid_argument("Str.search_backward");
case -1:
raise_not_found();
default:
return Val_int(res);
}
}
value str_beginning_group(ngroup) /* ML */
value ngroup;
{
return Val_int(start_regs[Int_val(ngroup)]);
}
value str_end_group(ngroup) /* ML */
value ngroup;
{
return Val_int(end_regs[Int_val(ngroup)]);
}
value str_replacement_text(repl, orig) /* ML */
value repl, orig;
{
value res;
mlsize_t len, n;
char * p, * q;
int c;
len = 0;
p = String_val(repl);
n = string_length(repl);
while (n > 0) {
c = *p++; n--;
if(c != '\\')
len++;
else {
if (n == 0) failwith("Str.replace: illegal backslash sequence");
c = *p++; n--;
switch (c) {
case '\\':
len++; break;
case '0': case '1': case '2': case '3': case '4':
case '5': case '6': case '7': case '8': case '9':
c -= '0';
len += end_regs[c] - start_regs[c]; break;
default:
len += 2; break;
}
}
}
{
Push_roots(r, 2);
r[0] = orig;
r[1] = repl;
res = alloc_string(len);
orig = r[0];
repl = r[1];
Pop_roots();
}
p = String_val(repl);
q = String_val(res);
n = string_length(repl);
while (n > 0) {
c = *p++; n--;
if(c != '\\')
*q++ = c;
else {
c = *p++; n--;
switch (c) {
case '\\':
*q++ = '\\'; break;
case '0': case '1': case '2': case '3': case '4':
case '5': case '6': case '7': case '8': case '9':
c -= '0';
len = end_regs[c] - start_regs[c];
bcopy(&Byte(orig, start_regs[c]), q, len);
q += len;
break;
default:
*q++ = '\\'; *q++ = c; break;
}
}
}
return res;
}
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